Chuck handling device



Feb. 13, 1945. C R 2,369,280

CHUCK HANDLING DEVICE Filed Jan. 11, 1943 2 Sheets-Sheet l INVENTOR. CHARLES M. CARR mmgw Feb. 13, 1945. c. M. CARR I 2,369,280

CHUCK HANDLING DEVICE Filed Jan. 11, 1943 2 Sheets-Sheet 2 INVENTOR. CHARLES PLCARR ATTORNEY.

Patented Feb. 13, 1945 omen PATENT orrlos owe M- can; cin ma o i o, as signor fto Zlh K- L1B.1o d ch n i ibo S mmer, Qincinnati, Ohio a corporation of Delaware Application January 11, 1943, Serial No.4-Y72;019 .3 c ai swho -a4) This invention pertains to chuck handling mechanism and is particularly related to -apparatus for manipulating the lathe chuck to and from operative position on the'lathe work spindle.

In the installation and removal of achuck, such as the commonly used three or four jaw chuck for a lathe spindle, it has always been a difficult problem to properly align the chuck with the work spindle while screwing it on the threaded nose thereof. A=lso, difficulty has been experiout of handand falls off of the end of the spindle when unscrewed too far without great care and physical exertion exerted upon theapart of the operator, resulting in the chuck dropping down on the bed ways and shears, .damagingthem and destroying their accuracy.

. ;It is therefore with these dormer difiiculties .in mind that the present chuck handlingdevice'was devised so that the chuck would at no time-have to be lifted by the operator :in presenting iton the 1 work spindle or removing it therefrom.

. Another pbject was to provide an larra ngement whereby the chuckcould .be :readily moved to and from working ,positiongon the work spindle and.

quickly removed therefrom to ,a position out of the way with regard to .other :fixtures which it. i ht bed ired o mount .on the worksl It is also an object of this invention to provide a chuck'handling .device which maynot .only

readi y br n e thuck into o er v position on the work spindlebut whichyaq urately aligns th .Qhuck and holds it rigidly in exact aligned sit o itht W k s i so thatit ,iSam relyy necessaryto rotate the work spindle hymeansoi l the. power transmission of the headstock for prewins th h ead o th s ndle a hu plate together for properly mounting-flit ,on :sthe

ork s nd f m l reversiee the wo spin d leoftthe headstock through its transmission the c uc a r p d y be hdr n romthe pindle whi s il l i c r e i nmen and thusprev nt from drop nedown pnrhe pen or repart of the operator.

device further-contemplates an arrangementfor gripping the chuck and at all times qui t ng y .phy fi erti n-whatsoeve 91. h

holding it in substantially operative position as it is swung to and from the spindle to a position in back of the lathe headstock to permit other types of work and fixtures to be mounted on. the 55 work spindle. his-understood with this arrangementfthat at no time is the chucking device lows cred-out of a =horizontalplane. Its axis of rotation is at all times maintained in a horizontal plane passing through the-axis .of rotation of :the work spindle and it is not necessary with this apparatus-to place the chuck on :the lfiOQI'.0I"L112Et it up again :or :to move it to .any other type ,of mold: ing device other than this complete mechanism carried by the lathe frame.

Further features and advantages of this invention .wiilappear from {the detailed description or the drawings in which: Figure 1 :is .al-cross section throughantengine J-lathe, .particularlylshowing the novel .chuck handling device mounted .911 ithe ahed of the lathe for manipulating a conventiona three jaw chuck for mounting or removal gt-rem the rlathe headstock spindle.

Figure 11 is a fragmentary planviewof aperhandlin devi e showin ts qnos tiqn o preseata iqn o the lchuck t the work spindl and it ino era ve o t o w th the ch ck moved tome ae p th headsmq oui cizth wa o o er-ls- .ips s tion of th la h :Eor e em la y pur ose -this i applied t a qnv n pna en ine la h ha ng e i d to M1 i rig d-11 axed the :JQEWKQP .2 to appro ate s rew it 9 b acket 3 i ircta ly mounte asunnq ls e em b means or hinge pin 5 and in turn on the bracket 41s one sup o t ng arm 6 h s??? to it y a pi ot qenectiqn'ihtoe h th medi m o the-Pin 1- .Qll t e QPP I-BIMO the su o ng a m 6 is ini tall mama a t d hams asguared uppe po t on 1. rests ldorrnu e and rig l fixed t the sur a es 8 o 1 11. are tc t e p r ine n ec 5 spltha the par s? and 5 .0 za aesu stantia ly an int ral p eceh lunher=s uared pom-o to o suitab e h ri o moun e ih votpin Z- .l'he

ea o tion o he .member J a flat ened nd Main whi h ma be sw n an are @9 A3 ca n edhn th r vot in M a haoutel snd o th mem e 10- .as tab thum hu A5 mounted on the ey bo 1. and en a es thatch s r ace idoft e m mbe i Mani u at n thethumb wt 1. effec rotting o th membe l aro nd i ts p vo 12.1. a rtica lan The other end of the member II is provided with a pair of chuck supporting strips llb which are appropriately welded or otherwise integrally fixed to the member? II at thetjboint I I0. and are appropriately rigidly spaced apart by means of the spacer bushings. I6 through which pass appropriate studs I1 clamped in place by nuts I8. The chuck I9 of the lathe is carried by its periphery I9a in engagement with the spacer bushings I6 as best seen in Figure I in such a way that its main axis of rotation 20 is in accurate horizontal alignment. The chuck jaws 2I and 22 are so positioned that they may be adjusted down to engage the top surface (Z of the supporting strips IIb so as to prevent the chuck from rotating when supported on the bushings I6.

It is therefore quite obvious that by adjusting the thumb nut I5 the axis 20 of the chuck I9 may be adjusted to the exact proper height to align itself with the work spindle axis 23 of the work spindle 24 in the headstock 25 and that the in-and-out adjustment in the horizontal plane and the eXact alignment, of the chuck axis 20 in other respects with the axis 23 of the Work spindle 24 may be effected by appropriately manipulating the entire device through the medium of its pivot pins 5, I, and 8.

In operation the chuck I9 is mounted in the device as shown in the drawings and the chuck moved toward the work spindle 24 whereupon the headstock transmission is operated to appropriately rotate the work spindle and thereby draw the chuck onits threaded portion 24a to bring the threaded portion 26 of the chuck I9 into full engagement with the work spindle of the lathe headstock 25. This engagement of the threaded portions 24a and 2B of the spindle and chuck respectively is accomplished while the chuck is held in exact alignment with the work spindle to thereby prevent any jamming or misalignment of the threads and to relieve all strain therefrom during the engagement of the chuck with the spindle. Similarly, by reversing the work spindle 24 of the lathe the chuck may be backed off and during the rotation of the work spindle 24 in either direction before engaging or disengaging the chuck from the work spindle the chuck is prevented from rotating by engagement of its jaws 2| and 22 with the surface IId of the supporting member IIb for the chuck. Thus in this arrangement it is merely necessary for the operator to swing the chuck from the rear into position and operate the work spindle to attach or detach it from the threaded nose portion of the spindle.

When the chuck is not to be used it is swung back to the position I9b t the rear of the headstock where it may be readily positioned by swinging the entire device away from the working position as best seen in Figure II. Thus when,

not in use the chuck is not moved in any vertical direction at all but is always ready to be attached to the work spindle without any lifting before required upon the part of the operator.

After the chucking device I9 has been appropriately gripped on the work spindle the han-' dling mechanism is detached from the chuck by first loosening the thumb nut I sufficiently to .permit the eye bolt I3 to be swung clockwise to the right in Figure I, thus permitting the member II tohave its end IIb dropped down to avoid the periphery of the chuck I9 and thus permit the entire device to be swung back away from working position on the lathe. To again re-enof the member I I and the thumb nut I5 tightened just sufiiciently to carry the weight of the chuck with its axis in accurate alignment with the work spindle. The work spindle is then operated in the reverse direction and the chuck thereby automatically withdrawn from the work spindle and held on the device. It may then be swung back to'the withdrawn position I92).

Having thus fully set forth and described my invention what I claim as new and desire to secure by United States Letters Patent is:

1. In a chuck handling device for a lathe, a plurality of inter-connected pivotal supporting arms, mounted on said lathe, means for supporting a chuck, said means including a lever pivoted intermediate of its length to one of said'arms and adapted to receive the chuck at one end of the lever, and means for adjustably movin the opposite end of the lever in order to cause the latter to swing into contact with the chuck whereby the upporting structure as a whole arms and adapted to receive the chuck at one end of the lever, and means for adjustably moving the opposite end of the lever in order to cause the latter to swing into contact with the chuck whereby the supporting structure as a whole accommodates itself to any size of chuck and is adapted to swing the chuck away from the lathe, the contacting portion of said lever being adapted to span a pair of jaws on said chuck in order wingably and adjustably to support the chuck on the lathe.

3. In a chuck handling device for a lathe, a'- plurality of inter-connected pivotal supporting arms-mounted on said lathe, means for supporting a chuck, said means including'a lever pivoted intermediate of its length to one of said arms and adapted to receive the chuck at one end of the lever, and means for adjustably moving the opposite end of the lever in order to cause the latter to swing into contact with the chuck whereby the supporting structure as a whole accommodates itself to any size of chuck and is -adapted to swing the chuck away from the lathe,

said lever comprising a pair of separated portions ecured together by spacer elements at a distance comparable to the thickness of the chuck body and the spacer elements being positioned along said lever at a distance comparable to the distance betweenthe outer edges of an adjacent pair of chuck jaws whereby the spaced portions of the lever can receive the 

